LOG4J2-759 minor site issues: use Velocity to auto-sync docs with project version when specifying jar files in console commands

git-svn-id: https://svn.apache.org/repos/asf/logging/log4j/log4j2/trunk@1615889 13f79535-47bb-0310-9956-ffa450edef68
LOG4J2-759 minor site issues: update change log

git-svn-id: https://svn.apache.org/repos/asf/logging/log4j/log4j2/trunk@1615891 13f79535-47bb-0310-9956-ffa450edef68